Drill.



G. 0. LEOPOLD.

DRILL.

APPLICATION FILED JUNE 13. 19m.

1,169,551, Patented Jan. 25, 1916.

4 SHEETS-SHEET 1.

G. 0. LEOPOLD.

DRILL.

APPLICATION FILED JUNE 13, 1914.

l 169,65? Patented Jan. 25, 1916.

4 SHEETS-SHEET 2.

G. 0. LEOPOLD DRILL.

APPLICATION man JUNE 13, 1914.

Patented Jan. 25, 1916.

4 SHEETS-SHEET 3- THE COLUMBIA PLANOGRAPH c0., WASHINGTON, D. c.

e. 0. LEOPOLD.

- DRILL. APPLICATION HLED JUNE 13, 1914,

Patented Jan. 25, 1916.

4 SHEETS-SHEET 4.

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GEORGE 0. LEOIPOLD, F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO NORTH BROS.

IVIFG. 00., 0F PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYL- VAN IA.

DRILL.

Specification of Letters Patent.

Patented Jan. 25, 4916.

Application filed June 13, 1914. Serial No. 844,931.

To all whom it may concern Be it known that I, Gnonon O. LnoPoLD, a citizen of the United States, residing in Philadelphia, Pennsylvania. have invent-ed certain Improvements in Drills, of which the following is a specification.

My invention relates to certain improvements in power drills and the object of the invention is to provide a simple and effective automatic feed, to provide an improved change speed gear, and to make the drill so that it can be quickly assembled and will be comparatively cheap to manufacture.

In the accompanying drawings: Figure 1 is a side view of my improved power drill press; Fig. 2 is an enlarged sectional plan view on the line aa Fig. 1; Fig. 3 is a sec tional elevation on the line bb, Fig. 2; Fig. 4 is a sectional View on the line c0, Fig. 3; Fig. 5 is a sectional elevation illustrating the change speed gearing; Fig. 6 is a sectional view on the line d(l, Fig. 5; Fig. 7 is a perspective view of the shifter rod; Fig. 8 is a detached perspective view of one of the keys;

1 Fig. 9 is a detached perspectiveview of the bolt for locking the feeding mechanism; Fig. 10 is a perspective view of the means for actuating said bolt; and Fig. 11 is a view showing the bolt withdrawn from the toothed feed spindle.

l is a standard having a foot 2, which may be secured to a stand or table in any suitable manner. In the face of this standard is a slideway 3 for the table bracket 4, which is secured thereto by a bolt 5. and in the bracket is a bearing 6 for the pivot pin 7 of the table 8. This table can be held in position by a clamp screw '9. Mounted on the end of the standard 1, or formed integral therewith, is a bracket 10 having bearings 10 for the horizontal power shaft 11 having the fast and loose pullevs 12 and 13 thereon. 14 is a spindle extending through the nortions 15 of the bearing and this spindle is geared to the main driving shaft 11 through an intermediate shaft 16. On the spindle 14 is a bevel gear wheel 17 which meshes with the bevel gear wheel 18 on the intermediate shaft and also on this intermediate shaft is a series of three gears 19 of different diameters, which mesh with corresponding gears 20 on the main shaft 11.

21 is a longitudinal shifter rod which is actuated by a lever 22, and this rod has a slot 23 for three keys 24 having pins 25. The

rod is notched at 26 and back of each key is a spring 27 which keeps the pins against the rod 21. and will force it into a notch when the notch comes in line with the pins.

In the shaft 11 is a series of recesses 28 and carried by the rod is a ball 29 backed by a spring 30, acting as a detent to hold the rod in any of its four positions, and by this means any one of the three gear wheels can be clutched to the main driving shaft according to the speed desired.

On abracket 31 adjustably mounted on the face 3 of the standard 1 is an automatic feed mechanism for feeding the drill to the work. On the spindle 14 is a feed screw 32 which extends through the bearing 33 and rests against a shoulder 84 on the enlarged portion of the spindle 14. Preferably located between the end of the feed screw and a rod mounted in the bracket 31 and an A extension bearing 31 forming a part of the bracket, as clearly shown in Fig. 3. As the spindle rotates the ratchet pawl will feed the ratchet wheel forward. 41 is the spring bearing against the pawl and on the outer end of the pawl stem is a cross bar 42, which enters a notch 43 in the end of the carrier so that, on turning the pawl, it can be thrown into or out of gear with the ratchet wheel 36.

On the bracket 31 is a projection in which is adjustably mounted a vertical stop 56 held by a set screw 57. The stop has a head 58 which is in the path'of the arm 42 and by adjusting this stop the feed of the spindle can be terminated at any point desired, as the arm 42 comes in contact with the head 58 and automatically throws the pawl out of'mesh with the wheel'36.

Meshing with the teeth of the feed screw isa toothed feed spindle 44. -When this spindle is stationary it acts as a nut for the screw, so that as the screw is turned it will feed downward, but when the spindle 44 is turned it acts as a rack wheel to raise or lower the spindle in the bracket.

The spindle 44 has a head 45 in which is a sliding handle 46 held by a spring-pressed pawl 47. By this construction the handle can be shifted from one side to the other when it is desired to increase the leverage.

In order to lock the spindle in its fixed po-g sition so that it will act as a nut, I provide a bolt 47 having teeth which enter the spaces shifter are pins 52 which limit its movement in either direction. VVhenthe shifter is in the position illustrated in Fig. 3, the

bolt locks the spindle so that it acts as a nut,but, when it is moved in the opposite direction against the pressure of the spring 53 which is held in position'by a plug 5%, it withdraws the bolt and holds it (Fig. 11) so that the spindle is free to rotate. I

59 is a belt shifter pivoted at 60 to shift the belt onto either the fast or the loose pulley.

By the above construction it will be seen that I am enabled to make a simple and practical drill which can be mounted on a bench, or other suitable support, and which can be driven by power.

In thepresent instance, I have illustrated the drill as having three change speed gears, but it will be understood that the drill may have two'or more than three, as desired,

' without departing from the main features of the invention. Furthermore, the feed mechanism is automatic in action and the depth of the drilling can be regulated. This mechanism is fully described and claimed in the patent granted to me on the 141th day ofJuly', 1914, No. 1,103,785.

, By making both the table bracket and the bracket holding the change speed mechanism" adjustably mounted and detachable from the standard, I am enabled to quickly assemble'the parts and to make them readily detachable for repairs, but it will be understood that the upper bearing may form an integral portion of the standard.

I claim:

"1. The combination in a drill," ofa standard, having a'bearing at its upper end; a horizontal dr vlng shaft; a vertical spindle; gearing between the drivmgshaft and the spindle; a feed screw on the spindle; a

bracket through which the feed screw and turning the spindle; and means for clamping the spindle to the bracket so that it will act as a nut.

2. The'combination of a standard; a hearing at the upper end of the standard; a horizontal driving shaft mounted in the bearing; avertical spindle, also mounted in the bearing; a feed screw on the spindle; a. bracket through v-Jhich the spindle and feed screw extend; ratchet mechanism for actuating the feed screw; an eccentric. on the spindle for actuating the ratchet mechanism; a transversely arranged spindle on the bracket having teeth directly engaging the feed screw; means for turning the spin dle; and means for clamping the spindle to the bracket.

3. The combination in a drill, of a standard; a spindle; a bracket; a feed screw on the spindle and extending through the bracket; ratchet mechanism for turning the feed screw from the spindle; a horizontal spindle having teeth meshing with the teeth of the feed screw; a bolt for locking the spindle in position; means for shifting the bolt so that the toothed spindle will act either as a nut for the feed screw or as a means for raising or lowering the spindle by hand.

4-. The combination in a drill, of a spindle; a feed screw on the spindle; means for turning the feedscrew; a spindle having teeth meshing with the teeth of the feed screw; a bolt having teeth arranged to engage the teeth of the spindle; a spring back of the bolt, said bolt being notched at one side; and a shifter flattened at one side and arranged to engage the bolt and to hold it out of mesh with the teeth of the spindle.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

GEORGE O. LEOPOLD. WVitne'sses Jos. I-I. KLEIN, 7M. A. BARR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. Washington, D. C. 

